Photographic change-box.



P. KAEMMERER.

PHO'OGRAPHIG CHANGE BOX.

APPLIUATION FILED JUNE 8,1906.

P. KAEMMERER. PHOTOGRAPHIC CHANGE BOX.

APPLICATION FILED JUNE 8,1908.

Patented June 29, i909.

2 SHEETS-SHEET 2.

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PAUL cininninnn, or sTnoLTTZ, NEAR enema', 'enermax-Assioma To THE FIRM or oPTlsonn ANsTALT o. e. Gonna AKTIENGESELLSCHAFT, oFrRrnnENAU, NEAR BER- LIN, GERMANY.

rno'roe'neenro enanenox.

eppncaon ined Jane s, 190s. semi No. 320,695. f

Specification o Letters atent.

v Patented June 29, 1909.

To ali whom it moyfconcern: Y i' Be it known that l, lirfn KAEMMEREP., a citizen of the German lEmpire, and resident ot Steglitz, near Berlin. Germany, engineer, have invented certain nen7 and useful Im provements in Photographic Change-Boxes, ot which the following is a specification.

This invention relates to an improved photographic' change-box adapted to be charged and emptied Without dilliculty lin daylight.' l? or this purposethe box is pro` vided with a closable charging-aperture and contains a rigid traine which is adapted to laterally inclose the plate and which is provided. at the end adjacent to the chargingaperrure, with an aperture for the passage of the plate, i

The invention is illustrated in the annexed drawing, in Which-` l Figure 1 is a longitudinal section through one torni of the improved change-box.. and vFig. 2 a plan-vieuT partly in section; Fig. 3 a sectional-viewillustrating the manner in which the change-box is charged, `andl Figs. t and 5 are sections illustrating a second embodiment of the invention. l

Referring to Figs. 1 to -3, the reference numeral 1 represents the box, and 2 the etrange-slide. 3 'represents a pile of sensitized plates.

At the front part of the change-slide 2 abutments it are provided, the purpose of which is to remove the uppermostl plate each time the slide is Withdrawn 'fronifthe box. rl`he plate withdrawn by this means assumes the position indicated b v dotted lines 5 and 1then the position S indicated by full lines. The back ot' the slide is Aprovided with projections 'i'. against which the plate withdrawn abats. Two springs S arranged within the slide serve to press the Withdrawn plate against the back of the said slide. 9

is the handle of the slide and 10 a spring' actuated roller connected with a screen 11,

one end of which is attached at 12 to the upper frame of the box V1. The back of the.

slide is beveled at 13-to facilitate the passage thereof underneath springs When the slide is inserted into the box. 14 is a plate for the support of the photographic plates 3. The springs 15 abut against the platelei and the latter is downwardly entat 116 in such a manner that a triangular space17, with its open end .facing the open end of the box 1, is left reebetween the platel Ail and the underniost plate 3.

18 is a stud which is fixed to the plate 14 and extends through an aperture in the wall of the box. The latter contains a rigid frame which; comprises a part 19 adjacent to the discharging-a erture of the box. The part 19 is provide( with apertures 20 for/the passage of the projections 7 already referred to. The lateral Walls of therigid frame are indicated by the numeral 21. Opposite the disclxarging-aperture the Vloom-is provided with a chargingaperture'22 normally closed by means of a slide-shutter 23. A short slide 24 adjacent to the shutter, 23 serves as an abutment for the. plates 3. 2 The case 25 containingl the plates is provided' with a frame 26 and slide-shutter 27 to-allow ot' inserting the plates into the-V change-box without exposure. *V

rlhe manner in which the change-box is used is as follows The open end of the ease is inserted into the aperture 22 of the `empty change-box so that a light-proof .joint is made between the ,tWo receptacles by means of the guides adjacent to .thesaid aperture 22. The slide-shutters 27f and 23 are thereupon withdrawn and also the abut' ment-slide`24. The change-box is then held in such a position that the plates slide by gravity from the case into the'box, the plate 14 being drawnback by means of thest-ud 18 in order to-allow the entrance of the photographic plates into the box. The lxed lateral 'frame-parts 21 guide the photographic plates, and the part`19 limits the` movement of the latter.- lWhen the' plates have entered the changebox the slide-shun,

ters 23`and 24e are closedand the box is ready for use. l

The plates arechanged in the known manner by successively withdrawing and re-inserting the change-slide, so that plates are successively removed Afrom the front of the pile and conveyed to the back thereof.'

Screen `11 being unrolled -from roller 1 0 when' the change-slide is drawn out-oi 'the change-box prevents the light from getting access to the exposed plate contained in the hollow of the change-slide. -When the' change-slide'is thereafter pushed .back inbo the change-box screen 11 is Wound up again allowing in this Way the exposure of the plates contained within the change-box.l

- to allow insertion or withdrawing of a package of plates or lms, it is necessary to depress the springs 3i.l in order to allow this slide 83 tilted to rods 34 is 4movable on the plate 30, andvis so arranged that when the slide is withdrawn by means of a handle it depresses' the springs 31 into the plane ot the plate 30. The temporary depression of the springs. allows of inserting photographic plates o r films into the change-box or of removing the contents of the Latter through the aperture 36, as described with reference to Figs. l to 3.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to beper- -formeil declare that What I claim is:

l. In a photographic changebox a. frame open at the top and bottom and adapted to inelose the plates in the box, said rame'being provided at one kendv with an aperture adapted to receive the plates to be exposed, an aperture in the side wall of the changebox adjacent to the aperture of said frame and provided with a closing device, an aperture at the other end of the change-box, and slideguided in said last named aperture of the .box adapted to successively move the plates' with the exclusion of light.

2. In a photographic change-box a frame open at the top and bottom'and adapted to inclose the plates in the box,isaid frame being provided 4at one end with an aperture adapted to receive the plates to be exposed, an aperture inthe side wall of the changeboX adjacent to the aperture of said frame and provided with a closing device, an apereeeiee y ture at the other end of the change-box, and a slide guided in said last named aperture of the box adapted to successively move the plates with the exclusion of light, resilient means arranged at the back ot. the .box 4to press the plates toward the plane of exposure, and outside means displacing said resilient means.

3. In a photographic changefbox a frame open at the top and bottom at one end, said frame adapted to inclose the plates in the box, and to receive the saine through said end opening, resilient means arranged at-'the baci; of the box to press the plates toward the plane ot' exposure, outside means for displacing said resilient means, apertures in two opposite side walls the change-box, one forming a charging-aperture adjacent to the open end of said traine and provided with a closing-device and a slide guided in the aperture of the box opposite the charging aperture, said slide adapted to successively move the plates with the exclusion of light.

Li. In a photographic change-box a frame open at the top and bottoni and at one end, said frame-adapted to laterally inclose the plates in the box and to receive same through said end opening, springs arranged at the back of the box adapted to press the plates toward the plane (it-exposure, a slide adapted to be niored over said springs in such a manner that the latter aile pressed toward the back of the box, a charging aperture in the side wall of the change-box adjacent to the aperture ,of said frame and provided with a closing-device,- a further aperture in the wall opposite Isaid rst named side Wall of the change-box, and a slide guided in said last named aperture of the box, said slide adapted to successively move the plates with the exclusion of light.

In testimony whereof l have signed this specification in the presence of two subscril ing witnesses.

.PAUL Kant/msnen.

Witnesses lVoLnmrAn llAUr'r, HENRY Hasrru. 

